340 



Index. 



Ochterus banksi, 52. 



Oehterus flaviclavvs, 52. 



Ochterus, Key to species, 51. 



Oligochaetes, 35, 242. 



Oliver, 14. 



Ormerod, 161. 



Orthoptera, 39. 



Oscellatoria, 244, 245, 247. 



Ostrocods, 24, 26, 34, 35, 42, 96, 97, 102, 



138, 161, 177, 186, 191, 193, 248. 

 Oviposition of aquatics, 33. 



P. 



Palmocorixa, 186. 



Palmocorixa, 211, 212. 



Palmocorixa, Key to species, 213i 



Palmocorixa buenoi, 27, 213, 221. 



Palmocorixa yillettii, 213, 214. 



Palumba, 92. 



Paramecium, 247. 



Parasites, 182. 



Parasitism, 31, 32, 231. 



Parshley, 51. 



Pediastrum, 248. 



Pelocoris, 198, 205, 308. 



Pelocoris biimpressus. 206, 207. 



Pelocoris carolinensis, 205, 206. 



Pelocoris femoratus, 206, 207, 209. 



Pelocoris, Key to species, 205. 



Pelogonus, 51. 



Pentacora, 55, 56. 



Pentacora hirla, 57. 



Pentacora ligata, 58. 



Pentacora signoreti, 56. 



Pettit, 160. 



Phyllopods, 186. 



Plant lice, 101, 102. 



Plea, 12, 30, 35, 41, 165, 177. 



Plea m.inutissima, 179. 



Plea striola, 33, 166, 177. 



Polygonum amphibium, 235. 



Potamogeton, 101. 



Prestwichia aquatica, 32, 160. 



Proctrotrypidffi, 32. 



Protozoa, 242. 



Protozoa, 35. 



R. 

 Ramphocorixa acuminata, 33, 211, 212, 215. 

 Ranatra, 13, 30, 31, 32, 158, 158. 

 Ranatra brecivolis, 155. 

 Ranatra americana, 154. 

 Ranatra annvlipes, 159. 

 Ranatra kirkaldyi, 154. 

 Ranatra nigra, 154. 

 Ranatra protensa, 156. 

 Ranatra quadridentata. 158. 

 Ranunculus aquatiles, 179. 

 Rathke, 235. 

 Reaumur, 13, 14, 15. 



Redfern, 195. 

 Regembart, 180, 208. 

 Respiration of aquatics, 43. 

 Reuter, 9, 11, 54, 211. 

 Rhagovelia, 30, 122, 128, 139. 

 Rhagovelia armata, 128, 130. 

 Rhagovelia distincta, 128, 129. 

 Rhagovelia obesa, 40, 128. 

 Rhagovelia plumbea, 128, 180. 

 Rheumatobates, 30, 33, 34, 42, 107, 



115, 120. 

 Rheumatobates, Key to species, 116. 

 Riley, C. F. C, 117. 

 Riley, C. V., 148. 

 Riley, W. A., 181. 

 Rivularia, 246. 

 Rn-sel, 13, 14, 157, 158, 208. 

 Rotifers, 35, 242, 244. 



S. 

 Salda, 55, 59. 



SaMa anfhracina. 61, 80, 81. 

 Salda coriacea, 60. 

 Salda Uttoralis, 59. 

 Saldid», 8, 11, 12, 18, 26, 29, 33, 39, 



42, 54. 

 Saldidfe, Biology of, 79. 

 Saldinre, Key to genera, 55. 

 Saldoida, 78. 

 Saldoida cormda, 79. 

 Saldoida slossoni, 78. 

 Saldula, 55-62. 

 Saldula confluenta, 63. 

 Saldula dispersa, 65. 

 Saldula elongata. 72. 

 Saldula explanata. 64. 

 Saldula inter stitialis, 65. 

 Saldula laticollis, 69. 

 Saldiila luctuosa, 78. 

 Saldula Tugubris, 72. 

 Sald^ila major, 62. 

 Saldula opacula, 70. 

 Saldula orbiculata, 63. 

 Saldula pellita, 71. 

 Saldula reperta, 67. 

 Saldula saUatoria, 73. 

 Saldula scotica, 71. 

 Saldtda separata. 66. 

 Saldula sphacelata, 69. 

 Saldula pallipes, 68. 

 Saldida zanthochila, 68. 

 Savigny, 15. 

 Say, 36. 



Scenedesmus, 35-244. 

 Schmidt, 144. 

 Schummel, 15. 

 Scirpus, 157. 

 Scott, 101. 

 Sedge, 103. 

 Severin & Severin, 145, 158. 



